Zenless Zone Zero: All HIA Commemorative Coins on Sixth Street

Sage in a Barrel is looking for someone to help it find all HIA Commemorative Coins. These coins can be found in Sixth Street and Brant Street Construction Site, and after collecting them, you can give them to the Sage in a Barrel for various rewards.

There are a total of 28 HIA Commemorative Coins, 18 of them are in the Sixth Street and the remaining 10 are in the Brant Street Construction.
This guide is for Sixth Street only, if you want to see the Coins' location on the Construction Site, look here: All HIA Commemorative Coins on Brant Street Construction Site

Where to Start the HIA Commemorative Coin Commission

First of all, talk to Elis at the Noodle Shop in the morning/afternoon and he will introduce you to the Sage in a Barrel and the coin-finding mechanic.

After that, you can see the navigation leads you to a trash can. This is the Sage in the Barrel and you need to find Commemorative Coins for it. Go back to Elis and you will complete the commission for now. The next thing you need to do is to find all the coins.

Tips on Finding the Commemorative Coins

If an NPC can be interacted with and have a grey speech bubble above their head, they will give you a coin.

If an object has a coin, however, it will have sparkles around it.

You can also check the New Eridu Time (on the top left corner) as it will show a list of activities that can be done near your location.

If there's an activity about 'Sage in a Barrel wants more Commemorative Coins,' that means there should be a coin somewhere in the area.

If you still don't know what to do, you can talk to Sage in a Barrel and ask for a hint by clicking the 'Gather Info.'

In addition, you can also see how many HIA Commemorative Coins you've got left to find by seeing how many items it has left to give you. That number is the number of HIA Commemorative Coins you've got left to find.

Remember that you can teleport to another location and teleport back to Sixth Street and it will reset the NPCs in that location. Or even easier, just enter and exit the Random Play rental store.

All 18 HIA Commemorative Coins on Sixth Street

Tips: In each timeframe, after talking to the NPC who gives out Commemorative Coins, enter the rental store (or any other store) and get out again to refresh the NPCs. This way, you can collect all the coins in the same timeframe.
Example: Talk to Sjal (#1 below) first and after she gives you the coin, enter the rental store. After you go out, Sjal will no longer be there as the NPCs' locations are refreshed. This time, find another NPC that gives you the coin (look for a grey speech bubble).

All the coins below are in the morning.

HIA Commemorative Coin #1

Talk to Elis at the Noodle Shop in the morning/afternoon and he will introduce you to the Sage in a Barrel and the coin-finding mechanic. At the same time, you will also get 1 coin.

HIA Commemorative Coin #2

In the morning, talk to Sjal in front of the sewer cover in between the Noodle Shop and the Random Play rental store.

HIA Commemorative Coin #3

In the morning, talk to Mrs. Yani in the same location as Clara before (next to the parking sign to the left of the rental store). She will ask you about a coin.

Now, go to the Convenience Store and talk to the Give Change Bangboo and ask about the coin. After that, talk again to Mrs. Yani and she will give you the Commemorative Coin.

HIA Commemorative Coin #4

In the morning, talk to Luo and Phil in front of the Remodeling Shop just beside the rental store.

After the rambling, go to the second floor of the Remodeling Shop and interact with the Empty Crate to get your Commemorative Coin.

HIA Commemorative Coin #5

The last coin that can be found in the morning is on the Fragrant Plant outside the Coffee Shop.

All the coins below are in the afternoon.

HIA Commemorative Coin #6

In the afternoon, talk to Clara next to the parking sign to the left of the rental store. She will ask you to take her picture so use the Camera.

HIA Commemorative Coin #7

In the afternoon, talk to Travis in front of the Random Play rental store and he will give you the coin.

HIA Commemorative Coin #8

In the afternoon, talk to Lupita beside the pole near the Coffee Shop and she will give you the coin.

HIA Commemorative Coin #9

In the afternoon, talk to Pavol Chuck beside the Convenience Store. After the conversation finished where he ask you to 'act,' talk to the Sage in a Barrel and then talk to Pavol Chuck again for the Commemorative Coin.

HIA Commemorative Coin #10

In the afternoon, interact with Mr. Panda outside of the Coffee Shop. Try to get this one after you get a lot of the coins (or just take it as the last one) because apparently, you can only find Mr. Panda after having a certain number of Commemorative Coins.

HIA Commemorative Coin #11

The last coin that can be found in the afternoon is in the Packing Crate outside the Bardic Needle record store.

All the coins below are in the evening.

HIA Commemorative Coin #12

In the evening, talk to Hannah outside of the Convenience Store. She will talk about a broken vending machine.

Go to said machine just beside the Convenience Store and choose the option 'Press the button for refunds' when it become available, and give it back to Hannah.

HIA Commemorative Coin #13

In the evening, enter the Random Play rental store and go to the staff room. Interact with the shining locker near the Workbench and you will get another Commemorative Coin. If it's not here, do the refreshing NPC trick. If it's still not there, wait for another evening.

HIA Commemorative Coin #14

In the evening, talk to Roy in front of the Convenience Store. Pay him 300 Dennies for the coin (I don't know what happened if you said you don't want it, maybe it just closed the dialog).

HIA Commemorative Coin #15

In the evening, talk to Jonah in front of the Godfinger Arcade. No task here, just talk to him.

HIA Commemorative Coin #16

The last coin that can be found in the evening is in the Dumpster just beside Officer Mewmew (behind the Newsstand).

All the coins below are in the midnight.

HIA Commemorative Coin #17

In the midnight, talk to Gerant near the roadblock past the Remodeling Store. Then, talk to Sita behind the Newsstand and she will give you a coin. Pass the coin to Gerant again and he will give it to you permanently.

HIA Commemorative Coin #18

At midnight, teleport to Gadget Store and interact with the Skateboard Bench just beside the sussy Bangboo mannequin.